diff --git a/src/polyfills.js b/src/polyfills.js
index 4080e5e..afc1c7c 100644
--- a/src/polyfills.js
+++ b/src/polyfills.js
@@ -478,6 +478,31 @@ wysihtml5.polyfills = function(win, doc) {
   } else {
     F();
   }
+
+  // CustomEvent for ie9 and up
+  function nativeCustomEventSupported() {
+    try {
+      var p = new CustomEvent('cat', {detail: {foo: 'bar'}});
+      return  'cat' === p.type && 'bar' === p.detail.foo;
+    } catch (e) {}
+    return false;
+  }
+  var customEventSupported = nativeCustomEventSupported();
+
+  // Polyfills CustomEvent object for IE9 and up
+  (function() {
+    if (!customEventSupported && "CustomEvent" in window) {
+      function CustomEvent(event, params) {
+        params = params || {bubbles: false, cancelable: false, detail: undefined};
+        var evt = doc.createEvent('CustomEvent');
+        evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
+        return evt;
+      }
+      CustomEvent.prototype = win.Event.prototype;
+      win.CustomEvent = CustomEvent;
+      customEventSupported = true;
+    }
+  })();
 };
 
 wysihtml5.polyfills(window, document);
diff --git a/src/selection/selection.js b/src/selection/selection.js
index d81cf8e..ae759cb 100644
--- a/src/selection/selection.js
+++ b/src/selection/selection.js
@@ -580,6 +580,11 @@
           startOffset = (sel.isBackwards()) ? sel.focusOffset : sel.anchorOffset,
           rng = this.createRange(), endNode, inTmpCaret;
 
+      // If start is textnode and all is whitespace before caret. Set start offset to 0
+      if (startNode && startNode.nodeType === 3 && (/^\s*$/).test(startNode.data.slice(0, startOffset))) {
+        startOffset = 0;
+      }
+
       // Escape temproray helper nodes if selection in them
       inTmpCaret = wysihtml5.dom.getParentElement(startNode, { query: '._wysihtml5-temp-caret-fix' }, 1);
       if (inTmpCaret) {
diff --git a/src/views/composer.observe.js b/src/views/composer.observe.js
index 224b087..3d280f3 100644
--- a/src/views/composer.observe.js
+++ b/src/views/composer.observe.js
@@ -59,7 +59,7 @@
         return true;
       }
       try {
-        var ev = new CustomEvent("wysihtml5:uneditable:delete");
+        var ev = new CustomEvent("wysihtml5:uneditable:delete", {bubbles: true, cancelable: false});
         before.node.dispatchEvent(ev);
       } catch (err) {}
       before.node.parentNode.removeChild(before.node);
@@ -154,18 +154,19 @@
         element = composer.element;
 
     if (selection.isCollapsed()) {
-      if (fixDeleteInTheBeginningOfLi(composer)) {
+      if (handleUneditableDeletion(composer)) {
         event.preventDefault();
         return;
-      } else if (fixDeleteInTheBeginningOfBlock(composer)) {
+      }
+      if (fixDeleteInTheBeginningOfLi(composer)) {
         event.preventDefault();
         return;
       }
-      if (fixLastBrDeletionInTable(composer)) {
+      if (fixDeleteInTheBeginningOfBlock(composer)) {
         event.preventDefault();
         return;
       }
-      if (handleUneditableDeletion(composer)) {
+      if (fixLastBrDeletionInTable(composer)) {
         event.preventDefault();
         return;
       }